210101211021020 has 48 divisors (see below), whose sum is σ = 485112717508608. Its totient is φ = 75798862090560.

The previous prime is 210101211021019. The next prime is 210101211021077. The reversal of 210101211021020 is 20120112101012.

It is a junction number, because it is equal to n+sod(n) for n = 210101211020986 and 210101211021004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3759836252 + ... + 3759892131.

It is an arithmetic number, because the mean of its divisors is an integer number (10106514948096).

Almost surely, 2^{210101211021020} is an apocalyptic number.

210101211021020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210101211021020 is an abundant number, since it is smaller than the sum of its proper divisors (275011506487588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210101211021020 is a wasteful number, since it uses less digits than its factorization.

210101211021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7519728530 (or 7519728528 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 210101211021020 its reverse (20120112101012), we get a palindrome (230221323122032).

The spelling of 210101211021020 in words is "two hundred ten trillion, one hundred one billion, two hundred eleven million, twenty-one thousand, twenty".